ClickHouse是俄罗斯的Yandex于2016年开源的列式存储数据库(DBMS),使用C++语言编写,主要用于在线分析处理查询(OLAP),能够使用SQL查询实时生成分析数据报告。 OLAP(On-Line Analytical Processing)翻译为联机分析处理,专注于分析处理,从对数据库操作来看,OLAP是对数据的查询; OLTP(on-line transactio
When a view cannot be merged into the main query you will often see a projection view operation. This indicates that the 'view' will be selected from directly as opposed to being broken down into joins on the base tables. A number of constructs make a view non mergeable. Inline views ar...
When a view cannot be merged into the main query you will often see a projection view operation. This indicates that the 'view' will be selected from directly as opposed to being broken down into joins on the base tables. A number of constructs make a view non mergeable. Inline views ar...
Explain plan is a feature that allows you to see a visual representation of the execution plan of a query in a tree or table format. When you execute your queries in the query window and the execution plan is available, you can view the plan under the 'Plan' tab. This feature is usef...
In addition to running the EXPLAIN PLAN command and displaying the plan, you can use the V$SQL_PLAN views to display the execution plan of a SQL statement: After the statement has executed, you can display the plan by querying the V$SQL_PLAN view. V$SQL_PLAN contains the execution plan ...
[转]Oracle执行计划（ExplainPlan）说明 [转]Oracle执⾏计划（ExplainPlan）说明 原⽂地址:http://langgufu.iteye.com/blog/2158163 如果要分析某条SQL的性能问题，通常我们要先看SQL的执⾏计划，看看SQL的每⼀步执⾏是否存在问题。如果⼀条SQL平时执⾏的好好的，却有⼀天突然性能很差，如果排除了...
After the Explain Plan statement is executed, a query is run to view the Explain Plan output. 2.Using the GUI-based DBMS_XPLAN package The DBMS_XPLAN package in the Oracle Database GUI provides a graphical view of the explain plan output. The package is useful for quickly viewing the ...
stalera Apr 3rd, 2010 Disabling the view state wherever necessary, having ajax play its role, removal of unnecessary controls. storing view state at server side if the view state is very heavy. Was this answer useful? Yes ReplyRelated Answered Questions...
FILTER_PREDS VARCHAR2INDEFAULT FUNCTIONDISPLAY_AWRRETURNSDBMS_XPLAN_TYPE_TABLE DISPLAY_AWR函数显示存储在AWR历史数据的执行计划。 提示:要正常调用DISPLAY_AWR 参数,必须对以下视图有权限:DBA_HIST_SQL_PLAN 和DBA_HIST_SQLTEXT 的SELECT。 参数名称 类型 输入/输出默认值?
No special permissions are required to be able to get the execution plan in Solid. DB Solo uses theEXPLAIN PLAN FORstatement to retrieve the plan from the database. More Information For more information on thisGraphical Explain Planfeature of DB Solo, please view the userdocumentation....